Battery pack box body

Abstract

The utility model discloses a battery pack box body, and relates to the technical field of battery packs. The box body is provided with an accommodating cavity capable of bearing a battery cell; the skin layer is attached to the inner side wall of the containing cavity to form a sealing cavity; and the supporting cross beam is arranged in the sealing cavity and is used for fixedly mounting the battery cell in the sealing cavity. The power battery box aims at improving the sealing effect of an existing power battery box and improving the heat preservation performance of the existing power battery box.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and particularly relates to a battery pack box body. Background Art

[0002] With the rapid development of the electric vehicle industry, as one of the core components, the power battery has received more and more attention and research. The design and manufacture of the power battery box body directly affect the performance, safety and endurance of electric vehicles. However, at present, most of the power battery box bodies commonly used in the market are welded together by a single metal material (such as steel or aluminum alloy).

[0003] Since the battery box body needs to ensure the safety and sealing of the internal battery modules, any sealing failure will cause the external environment (such as moisture, dust, etc.) to enter, which will further lead to a decline in battery performance or even safety accidents. Multiple welding points not only increase the manufacturing complexity and cost, but also increase the risk of sealing failure.

[0004] At the same time, the metal material itself has good thermal conductivity and electrical conductivity. When the battery is working, a large amount of heat will be generated. The high thermal conductivity of the metal material will accelerate heat transfer, making it difficult to maintain the heat preservation performance of the battery pack, affecting the efficiency and life of the battery. At the same time, the high electrical conductivity of the metal material also brings potential safety hazards. When the battery box body directly holds the battery cells, serious safety accidents may occur due to accidental short circuits or other electrical faults.

[0005] Therefore, how to improve the sealing effect of the existing power battery box body and at the same time improve its heat preservation performance has become an urgent technical problem to be solved. Summary of the Utility Model

[0006] The main purpose of the utility model is to provide a battery pack box body, aiming to improve the sealing effect of the existing power battery box body and at the same time improve its heat preservation performance.

[0007] To achieve the above purpose, the utility model provides a battery pack box body, including:

[0008] A box body with an accommodating cavity capable of carrying battery cells;

[0009] A skin layer attached to the inner side wall of the accommodating cavity to form a sealed cavity; and

[0010] Support cross beams arranged in the sealed cavity for fixing the battery cells installed in the sealed cavity.

[0011] The skin layer is attached to the inner sidewall of the accommodation cavity, forming a sealed cavity, which effectively prevents moisture, dust, etc. in the external environment from entering the interior of the battery pack, protects the battery cells from external influences, and improves the reliability and service life of the battery pack. The support crossbeam is arranged in the sealed cavity, providing stable support and fixation for the battery cells, preventing the battery cells from moving or vibrating during use, and ensuring the structural stability and safety of the battery pack. Due to the heat insulation performance of the skin layer, it can effectively isolate the influence of the external temperature on the battery cells and improve the heat preservation performance of the battery pack.

[0012] In an embodiment of the present application, the skin layer is integrally die-cast after mixing resin and reinforcing fibers.

[0013] The combination of resin and reinforcing fibers can significantly improve the strength and stiffness of the skin layer, enabling it to withstand greater loads and impacts. It further improves the sealing performance and safety of the skin layer.

[0014] In an embodiment of the present application, at least one first through hole is provided at the bottom of the box body, at least one second through hole is provided on the skin layer, and at least one blind hole is provided on the support crossbeam. The positions of the first through hole, the second through hole, and the blind hole correspond to each other one by one. The double-layer rivet nuts sequentially pass through the first through hole, the second through hole, and the blind hole to lock the box body, the skin layer, and the support crossbeam to each other.

[0015] The box body, the skin layer, and the support crossbeam are tightly connected together in a multi-layer structure by the double-layer rivet nuts to form an integral body. It not only improves the structural stability but also enhances the connection strength between the layers. The positions of the first through hole, the second through hole, and the blind hole correspond to each other one by one, ensuring that each part can be accurately aligned during the assembly process. It reduces the installation error and improves the assembly efficiency and quality.

[0016] In an embodiment of the present application, a bottom protection plate for protecting the box body is further provided at the bottom of the box body.

[0017] The safety of the box body is further improved by providing the bottom protection plate.

[0018] In an embodiment of the present application, the bottom protection plate is fixed below the box body by bolts passing through the double-layer rivet nuts.

[0019] The bottom protection plate is fixed below the box body by bolts passing through the double-layer rivet nuts, which facilitates the installation and disassembly of the bottom protection plate and is convenient for later maintenance.

[0020] In an embodiment of the present application, a reinforcing plate is provided on at least one sidewall of the support crossbeam, and the reinforcing plate is close to the end of the support crossbeam for fixing the support crossbeam to the skin layer.

[0021] By providing reinforcing plates on the side walls of the support crossbeam and fixing them to the skin layer, this design significantly enhances the structural stability of the support crossbeam. The reinforcing plates provide additional support, preventing the support crossbeam from deforming or loosening when bearing loads. At the same time, the reinforcing plates are arranged near the ends of the support crossbeam, effectively dispersing the stress on the support crossbeam, optimizing the force distribution, preventing local stress concentration, and improving the mechanical properties of the entire battery pack housing.

[0022] In one embodiment of the present application, the number of the reinforcing plates is two.

[0023] Further enhances the structural stability of the support crossbeam.

[0024] In one embodiment of the present application, at least one first through-hole is provided at the bottom of the housing body, at least one second through-hole is provided on the skin layer, and at least one third through-hole is provided on the support crossbeam. The positions of the first through-hole, the second through-hole, and the third blind hole correspond to each other one by one. The sleeve sequentially passes through the first through-hole, the second through-hole, and the third through-hole to form a lifting point.

[0025] By the sleeve sequentially passing through the through-holes of the housing body, the skin layer, and the support crossbeam, the three are tightly connected together to form a lifting point. This not only improves the structural stability but also enhances the connection strength between the layers. The positions of the first through-hole, the second through-hole, and the third through-hole correspond to each other one by one, ensuring that each part can be accurately aligned during the assembly process. It reduces the installation error, improves the assembly efficiency and quality. The use of the sleeve to form a lifting point effectively improves the load-bearing capacity of the battery pack, facilitating the lifting and fixing of the battery pack. The design of the lifting point also increases the safety and stability of the battery pack during transportation and installation.

[0026] In one embodiment of the present application, the sleeve includes:

[0027] A long bushing that sequentially passes through the first through-hole, the second through-hole, and the third through-hole;

[0028] A short bushing that is threadedly connected to the top of the long bushing; and

[0029] A lifting point nut that is threadedly connected to the bottom of the long bushing and cooperates with the short bushing to lock the housing body, the skin layer, the support crossbeam, and the bottom guard plate to the long bushing.

[0030] By the long bushing sequentially passing through the through-holes of the housing body, the skin layer, the support crossbeam, and the bottom guard plate, and locking these parts together by the short bushing and the lifting point nut, a stable multi-layer connection structure is formed. This not only improves the overall structural stability but also enhances the connection strength between the layers. The design of the lifting point also increases the safety and stability of the battery pack during transportation and installation.

[0031] In an embodiment of the present application, a sealing rubber ring is provided between the long bushing and the short bushing.

[0032] A sealing rubber ring is provided between the long bushing and the short bushing, and an interference fit is achieved through the sealing ring, improving the sealing effect and enhancing the connection strength.

[0033] Adopting the above technical solution, the skin layer is attached to the inner side wall of the accommodation cavity, forming a sealed cavity, effectively preventing moisture, dust, etc. in the external environment from entering the battery pack, protecting the battery cells from external influences, and improving the reliability and service life of the battery pack. The support cross beam is arranged in the sealed cavity, providing stable support and fixation for the battery cells, preventing the battery cells from moving or vibrating during use, and ensuring the structural stability and safety of the battery pack. Due to the heat insulation performance of the skin layer, the influence of the external temperature on the battery cells can be effectively isolated, enhancing the heat preservation performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following will describe the present invention in detail with reference to specific embodiments and the accompanying drawings, where:

[0035] Figure 1 is an exploded structural schematic diagram of the first embodiment of the present invention;

[0036] Figure 2 is a top view of the present invention;

[0037] Figure 3 is Figure 2 a cross-sectional view taken along the C-C direction in

[0038] Figure 4 is Figure 3 an enlarged structural schematic diagram of part A in

[0039] Figure 5 is Figure 3 an enlarged structural schematic diagram of part B in

[0040] 10. Box body; 20. Skin layer; 30. Support cross beam; 40. Reinforcing plate; 50. Bottom guard plate; 60. Double-layer rivet nut; 61. Bolt; 71. Long bushing; 72. Short bushing; 73. Hanging point nut; 74. Sealing rubber ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will describe the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not limit the present invention.

[0042] As Figures 1 to 5 shown, in order to achieve the above purpose, the present invention provides a battery pack box body, including:

[0043] The box body 10 has a receiving cavity capable of carrying battery cells.

[0044] The skin layer 20 is attached to the inner side wall of the receiving cavity to form a sealed cavity; and

[0045] The support cross beam 30 is disposed in the sealed cavity and is used for fixedly installing the battery cells in the sealed cavity.

[0046] Specifically, the box body 10 has a receiving cavity for carrying battery cells. The box body 10 is formed by welding profiles made of metal materials to provide necessary strength and durability.

[0047] The skin layer 20 is attached to the inner side wall of the receiving cavity to form a sealed cavity. The skin layer 20 can be made of flexible materials or materials with good sealing performance to ensure the sealing inside the battery pack and prevent the influence of the external environment on the battery cells.

[0048] The support cross beam 30 is arranged in the sealed cavity and is used for fixedly installing the battery cells. The support cross beam 30 can be designed into different shapes and structures according to design requirements to adapt to different types and quantities of battery cells and provide necessary mechanical support and fixing functions.

[0049] The skin layer 20 is closely attached to the inner side wall of the receiving cavity of the box body 10. Through this attachment, the skin layer 20 and the box body 10 together form a sealed cavity. The installation of the skin layer 20 can adopt bonding or other suitable connection methods to ensure its firmness and sealing performance.

[0050] The support cross beam 30 is fixedly installed in the sealed cavity and is connected to the box body 10 by bolts 61, welding or other mechanical fixing methods. The position and quantity of the support cross beam 30 can be adjusted according to the specific battery cell configuration to ensure that all battery cells can be reliably supported and fixed.

[0051] Adopting the above technical solution, the skin layer 20 is attached to the inner side wall of the receiving cavity to form a sealed cavity, effectively preventing moisture, dust, etc. in the external environment from entering the inside of the battery pack, protecting the battery cells from the influence of the outside world, and improving the reliability and service life of the battery pack. The support cross beam 30 is disposed in the sealed cavity to provide stable support and fixation for the battery cells, preventing the battery cells from moving or vibrating during use, and ensuring the structural stability and safety of the battery pack. Due to the heat insulation performance of the skin layer 20, it can effectively isolate the influence of the external temperature on the battery cells and improve the heat preservation performance of the battery pack.

[0052] In an embodiment of the present application, the skin layer 20 is integrally die-cast after mixing resin and reinforcing fibers.

[0053] With the above technical solution, the combination of the resin and the reinforcing fiber can significantly improve the strength and stiffness of the skin layer 20, enabling it to withstand greater loads and impacts. Furthermore, the sealing performance and safety of the skin layer 20 are further enhanced.

[0054] In an embodiment of the present application, at least one first through hole is provided at the bottom of the box body 10, at least one second through hole is provided on the skin layer 20, and at least one blind hole is provided on the support cross beam. The positions of the first through hole, the second through hole, and the blind hole correspond to each other one by one. The double-layer rivet nut 60 sequentially passes through the first through hole, the second through hole, and the blind hole to lock the box body 10, the skin layer 20, and the support cross beam 30 to each other.

[0055] Specifically, at least one first through hole is provided at the bottom of the box body 10. At least one second through hole corresponding to the first through hole is provided on the skin layer 20. At least one blind hole corresponding to the first through hole and the second through hole is provided on the support cross beam 30. The double-layer rivet nut 60 sequentially passes through the first through hole, the second through hole, and the blind hole to realize the locking of the multi-layer structure.

[0056] Among them, the positions of the first through holes at the bottom of the box body 10 and the second through holes on the skin layer 20 correspond to each other one by one. The skin layer 20 is closely attached to the inner side wall of the accommodating cavity of the box body 10 to ensure the sealing performance.

[0057] The positions of the second through holes on the skin layer 20 and the blind holes on the support cross beam 30 correspond to each other one by one. The support cross beam 30 is fixed in the sealed cavity and realizes mechanical connection with the skin layer 20 and the box body 10 through the blind holes.

[0058] The double-layer rivet nut 60 sequentially passes through the first through hole of the box body 10, the second through hole of the skin layer 20, and the blind hole of the support cross beam 30 to tightly lock the three together. The position of each nut corresponds to the corresponding through hole and blind hole one by one to ensure the stability and consistency of the entire structure.

[0059] With the above technical solution, the multi-layer structures of the box body 10, the skin layer 20, and the support cross beam 30 are tightly connected together by the double-layer rivet nut 60 to form an integral body. Not only the stability of the structure is improved, but also the connection strength between the layers is enhanced. The positions of the first through hole, the second through hole, and the blind hole correspond to each other one by one to ensure that each part can be accurately aligned during the assembly process. The installation error is reduced, and the assembly efficiency and quality are improved.

[0060] In an embodiment of the present application, a bottom guard plate 50 for protecting the box body 10 is further provided at the bottom of the box body 10.

[0061] With the above technical solution, the safety of the box body 10 is further improved by providing the bottom guard plate 50.

[0062] In an embodiment of the present application, the bottom guard plate 50 is fixed below the box body 10 by bolts 61 passing through the double-layer rivet nuts 60.

[0063] With the above technical solution, the bottom guard plate 50 is fixed below the box body 10 by bolts 61 passing through the double-layer rivet nuts 60, which facilitates the installation and disassembly of the bottom guard plate 50 and is convenient for later maintenance.

[0064] In an embodiment of the present application, at least one side wall of the support cross beam 30 is provided with a reinforcing plate 40, and the reinforcing plate 40 is close to the end of the support cross beam 30 for fixing the support cross beam 30 to the skin layer 20.

[0065] Specifically, the reinforcing plate 40 is located on the side wall of the support cross beam 30 and close to the end of the support cross beam 30. The reinforcing plate 40 is used to fix the support cross beam 30 to the skin layer 20 to provide additional structural support.

[0066] The reinforcing plate 40 is located on the side wall of the support cross beam 30 and close to the end of the support cross beam 30. The reinforcing plate 40 firmly fixes the support cross beam 30 to the skin layer 20 by bonding to provide additional support and strengthening effect.

[0067] With the above technical solution, by providing the reinforcing plate 40 on the side wall of the support cross beam 30 and fixing it to the skin layer 20, this design greatly enhances the structural stability of the support cross beam 30. The reinforcing plate 40 provides additional support to prevent the support cross beam 30 from deforming or loosening when bearing a load. At the same time, the reinforcing plate 40 is provided close to the end of the support cross beam 30, effectively dispersing the stress on the support cross beam 30, optimizing the force distribution, preventing local stress concentration, and improving the mechanical properties of the entire battery pack box body.

[0068] In an embodiment of the present application, the number of the reinforcing plates 40 is two.

[0069] With the above technical solution, the structural stability of the support cross beam 30 is further enhanced.

[0070] In an embodiment of the present application, at least one first through hole is provided at the bottom of the box body 10, at least one second through hole is provided on the skin layer 20, and at least one third through hole is provided on the support cross beam. The positions of the first through hole, the second through hole, and the third blind hole correspond to each other one by one, and the sleeve sequentially passes through the first through hole, the second through hole, and the third through hole to form a lifting point.

[0071] Specifically, at least one first through hole is provided at the bottom of the box body 10. At least one second through hole corresponding to the first through hole of the box body 10 is provided on the skin layer 20. At least one third through hole corresponding to the first through hole of the box body 10 and the second through hole of the skin layer 20 is provided on the support cross beam 30. The sleeve passes through the first through hole of the box body 10, the second through hole of the skin layer 20, and the third through hole of the support cross beam 30 to form a lifting point for lifting and fixing the entire battery pack.

[0072] The positions of the first through holes at the bottom of the box body 10 correspond one-to-one with the positions of the second through holes on the skin layer 20. The skin layer 20 is closely attached to the inner side wall of the accommodation cavity of the box body 10 to ensure the sealing performance. The positions of the second through holes on the skin layer 20 correspond one-to-one with the positions of the third through holes on the support cross beam 30. The sleeve passes through the first through hole of the box body 10, the second through hole of the skin layer 20, and the third through hole of the support cross beam 30 in sequence, tightly connecting the three together to form a lifting point. The position of each through hole corresponds one-to-one with the corresponding sleeve to ensure the stability of the overall structure.

[0073] Adopting the above technical solution, the sleeve passes through the through holes of the box body 10, the skin layer 20, and the support cross beam 30 in sequence, tightly connecting the three together to form a lifting point. This not only improves the stability of the structure but also enhances the connection strength between the layers. The positions of the first through hole, the second through hole, and the third through hole correspond one-to-one, ensuring that each part can be accurately aligned during the assembly process. It reduces the installation error, improves the assembly efficiency and quality. The use of the sleeve forms a lifting point, effectively improving the load-bearing capacity of the battery pack and facilitating the lifting and fixing of the battery pack. The design of the lifting point also increases the safety and stability of the battery pack during transportation and installation.

[0074] In an embodiment of the present application, the sleeve includes:

[0075] A long bushing 71, which passes through the first through hole, the second through hole, and the third through hole in sequence;

[0076] A short bushing 72, which is threadedly connected to the top of the long bushing 71; and

[0077] A lifting point nut 73, which is threadedly connected to the bottom of the long bushing 71 and cooperates with the short bushing 72 to lock the box body 10, the skin layer 20, the support cross beam 30, and the bottom guard plate 50 onto the long bushing 71.

[0078] Specifically, the long bushing 71 sequentially passes through the first through-hole of the box body 10, the second through-hole of the skin layer 20, the third through-hole of the support cross beam 30, and the position hole of the bottom guard plate 50. The short bushing 72 is threadedly connected to the top of the long bushing 71 to provide a fixing and locking function. The suspension point nut 73 is threadedly connected to the bottom of the long bushing 71 and cooperates with the short bushing 72 to lock the box body 10, the skin layer 20, the support cross beam 30, and the bottom guard plate 50 onto the long bushing 71 to form a suspension point.

[0079] With the above technical solution, the long bushing 71 sequentially passes through the through-holes of the box body 10, the skin layer 20, the support cross beam 30, and the bottom guard plate 50, and these parts are locked together by the short bushing 72 and the suspension point nut 73 to form a stable multi-layer connection structure. This not only improves the stability of the overall structure but also enhances the connection strength between the layers. The design of the suspension point also increases the safety and stability of the battery pack during transportation and installation.

[0080] In an embodiment of the present application, a sealing rubber ring 74 is provided between the long bushing 71 and the short bushing 72.

[0081] With the above technical solution, a sealing rubber ring 74 is provided between the long bushing 71 and the short bushing 72. An interference fit is achieved through the sealing rubber ring 74, improving the sealing effect and enhancing the connection strength.

[0082] The above are only the preferred embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A battery pack housing, characterized in that, Including: A box body with a receiving cavity capable of carrying battery cells; A skin layer attached to the inner side wall of the receiving cavity to form a sealed cavity; And Support cross beams disposed in the sealed cavity for fixedly mounting the battery cells in the sealed cavity.

2. The battery pack housing according to claim 1, characterized in that, The skin layer is integrally die-cast after mixing resin and reinforcing fibers.

3. The battery pack housing according to claim 1, wherein At least one first through hole is provided at the bottom of the box body, at least one second through hole is provided on the skin layer, and at least one blind hole is provided on the support cross beam. The positions of the first through hole, the second through hole, and the blind hole correspond to each other one by one. A double-layer rivet nut sequentially passes through the first through hole, the second through hole, and the blind hole to lock the box body, the skin layer, and the support cross beam to each other.

4. The battery pack housing according to claim 3, characterized in that, A bottom protection plate for protecting the box body is further provided at the bottom of the box body.

5. The battery pack housing according to claim 4, wherein, The bottom protection plate is fixed below the box body by bolts passing through the double-layer rivet nut.

6. The battery pack housing according to claim 1, characterized in that, Reinforcing plates are provided on at least one side wall of the support cross beam, and the reinforcing plates are close to the ends of the support cross beam for fixing the support cross beam to the skin layer.

7. The battery pack housing according to claim 6, wherein The number of the reinforcing plates is two.

8. The battery pack housing according to claim 1, characterized in that, At least one first through hole is provided at the bottom of the box body, at least one second through hole is provided on the skin layer, and at least one third through hole is provided on the support cross beam. The positions of the first through hole, the second through hole, and the third blind hole correspond to each other one by one. A sleeve sequentially passes through the first through hole, the second through hole, and the third through hole to form a lifting point.

9. The battery pack housing according to claim 8, characterized in that, The sleeve includes: A long bushing sequentially passing through the first through hole, the second through hole, and the third through hole; A short bushing threadedly connected to the top of the long bushing; and A lifting point nut threadedly connected to the bottom of the long bushing and cooperating with the short bushing to lock the box body, the skin layer, the support cross beam, and the bottom protection plate to the long bushing.

10. The battery pack housing according to claim 9, wherein, A sealing rubber ring is provided between the long bushing and the short bushing.

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